In this tutorial, you are going to learn how to change your username on your Mac. This includes both your ACCOUNT NAME and FULL NAME.
WARNING: By doing this, you could have issues with file locations due to the naming of directories after your account name.
The first thing you want to do is make sure you are logged into your account and then click the Apple logo at the top of your screen and go to SYSTEM PREFERENCES.
Once under system preferences you want to select the Users and Groups option.
Once you are under the Users and Groups settings you WILL NOT be able to make changes until you unlock the settings with an Admin account. Click the lock icon at the bottom of the settings to bring up your login information. Type in your password here to unlock the settings.
You will now see all of your Users on the left hand side of the screen. Right click (control+click) on the one that you want to change the name. You will see an option that says “Advanced Options”. Click that.
Once under the advanced options, you will now see two different places to change your name. One is the Account Name, and the other is the Full Name (Display Name or what you see when logging in) You can change either of these.
However, IF you are logged in as the Admin you CANNOT change the Account Name while you are logged in. The easiest way around this is to just create another Admin account, login with the new one and then you will be able to change the Account Name from the other Admin account.
That’s it! You now know how to change your Mac username!